"Railroads of Caribou" at the Caribou Historical Center and Museum. Open 12-4 p.m. Saturdays; 1033 Presque Isle Road. All are welcome.

Inaugural Presque Isle Civil War Trails tour, 1-3 p.m. on Molly the Trolley, starting at Historical Fire Station on Church St. Reservations required; $10/person.

Homecoming wine tasting at UMPI President's House, 4:30-6:30 p.m. Alumni, parents, family, friends and community welcome. Three stations with appetizer or dessert pairing for each wine. RSVP: Lisa Pucci, 768-9525 […]

Farmers' market at Riverside Park, 8:30 a.m.-1 p.m. Vegetables, meat, eggs, baked goods and more. Concession available.

Apple festival and bake sale at Grant Memorial United Methodist Church, 5-6 p.m. Cost: $8/adults, $4 children. Proceeds go toward duffel bags for children removed from their homes by DHHS.

Inaugural Presque Isle Civil War Trails tour, 1-3 p.m. on Molly the Trolley, starting at Historical Fire Station on Church St. Reservations required; $10/person.